Figure 1:
Percentage of mortality of different stages of Maconellicoccus hirsutus according to different concentrations of Heterorhabditis amazonensis; dark gray bars = females; light gray bars = second and third nymphal stages; white bars = crawlers (first nymphal stage). Bars with the same letters do not differ significantly among treatments per developmental stage (means ± sem).
Table 1.
Median number of Heterorhabditis amazonensis capable to invade different developmental stages of Maconellicoccus hirsutus.
| Maconellicoccus hirsutus | ||||
|---|---|---|---|---|
| Stage | Concentration (IJs) | Median (IJs) | First quartile | Third quartile |
| Females | 20 | 0.5 | 0 | 6 |
| 40 | 6 | 5 | 9 | |
| 60 | 4.5 | 3 | 10 | |
| 80 | 4.5 | 3 | 19 | |
| 100 | 22 a | 8 | 22 | |
| 2nd and 3rd stages | 20 | 0 | 0 | 0 |
| 40 | 0 | 2 | 8 | |
| 60 | 0 | 5 | 6 | |
| 80 | 1 | 0 | 3 | |
| 100 | 4 | 5 | 11 | |
| Crawlers | 20 | 0 | 0 | 0 |
| 40 | 0 | 0 | 0 | |
| 60 | 0 | 0 | 0 | |
| 80 | 1 | 0 | 1 | |
| 100 | 1 | 0 | 1 | |
Figure 2:
Percent invasion by Heterorhabditis amazonensis of different stages of Maconellicoccus hirsutus at different concentrations. Dark gray bars = females; light gray bars = second and third nymphal stages; white bars = crawlers (first nymphal stage). Bars with the same letters do not differ significantly among treatments per developmental stage (means ± sem).
Table 2.
Lethal concentrations of Heterorhabditis amazonensis to kill different stages of Maconellicoccus hirsutus.
| Stage | LD50 | LD75 | LD90 |
|---|---|---|---|
| Females | 35.2 | 64.5 | 106.7 |
| 2nd and 3rd stages | 83.9 | 127.6 | 190.5 |
| Crawlers | 142.7 | 189.7 | 257.2 |
Figure 3:
Probability of mortality of different stages of Maconellicoccus hirsutus according to the number of Heterorhabditis amazonensis (probit). A = females, B = second and third instars, C = crawlers. Black lines represent the mean of the probability. Gray lines represent confidence intervals (95%).